CHARACTERIZATION OF INDUSTRIAL WASTEWATER TREATMENT DYNAMICS USING FAST FOURIER TRANSFORM ANALYSIS

Fast Fourier transform analysis has been applied to decompose the variance of some temporal series from an A+B industrial wastewater treatment system, as well as to discriminate which frequencies are basically contributing to parameter variability. The basic oscillations of the effluents, evaluated...

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Bibliographic Details
Published in:Water science and technology 1994, Vol.30 (2), p.229-232
Main Authors: Becares, E, Garcia-Olivares, A J
Format: Article
Language:English
Subjects:
Activated sludge process
Chemical oxygen demand
Complexity
Dynamics
Effluents
Fast Fourier transformations
Forces (mechanics)
Fourier transforms
Industrial wastes
Industrial wastewater
Industrial wastewater treatment
Oscillations
Q1
Reactors
Retention time
Sewage disposal
Variance analysis
Wastewater
Wastewater treatment
Water treatment
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Summary:Fast Fourier transform analysis has been applied to decompose the variance of some temporal series from an A+B industrial wastewater treatment system, as well as to discriminate which frequencies are basically contributing to parameter variability. The basic oscillations of the effluents, evaluated by means of the total COD, are shown to be mainly dependent on the internal dynamics of the reactors, whose design and control features are the generating forces for the final effluent fluctuations. Owing to the shorter retention time in the first reactor, the output signal was more complex than the input one. Although the second reactor reduces system complexity, it does not have an important effect on the final total COD.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1994.0047